Definition: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Input: Question: I gain 70 paise on Rs.70. My gain percent is

 Option A: 0.1%

 Option B: 1%

 Option C: 7%

 Option D: 10%

 Option E: None

Option B